COVER INFORMATION Station: DARNHALL (Code Da ) Experiment: Network Monitoring Experiment Exp. Code: N25L1 Schedule Version: 1.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Benito Marcote Address: JIVE Oude Hoogeveensedijk 4 7991 PD Dwingeloo The Netherlands Phone: +31 521 596 508 EMAIL: marcote@jive.eu Fax: Phone during observation: +31 521 596 508 Observing mode: vlbi Notes: L-band (18 cm) NME and ftp fringe test for Session 1, 2025. EVN: 1024 Mbps, L+R, 2-bit sampling, 8 BBC, 32 MHz filters eMERLIN: 512 Mbps, L+R, 2-bit sampling, 2 BBC, 64 MHz filters Please DO NOT use the phase cal signal. COVER LETTER: This is the schedule for the 18-cm NME and ftp fringe-test on 20 February 2025 involving 10 EVN antennas + eMERLIN: Jb1, Wb, Ef, Nt, O8, T6, Ur, Tr, Hh, Ir, Cm, Da, Kn, Pi, De The NME uses a standard setup with 1024 Mbps (512 Mbps for eMERLIN). The following ftp-fringe tests are scheduled throughout the experiment (UT times): 12:10:00 (scan 2, 2 sec, J0237+2848) 12:40:00 (scan 4, 2 sec, J0237+2848) 13:10:00 (scan 6, 2 sec, J0237+2848) 13:40:00 (scan 8, 2 sec, J0237+2848) 14:10:00 (scan 10, 2 sec, J0237+2848) 14:40:00 (scan 12, 2 sec, J0237+2848) New year new observations! Mattermost: coms.evlbi.org Schedule for DARNHALL (Code Da ) Page 2 Network Monitoring Experiment UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 20 Feb 2025 Day 51 --- Next scan frequencies: 1626.49 1626.49 Next BBC frequencies: 645.51 645.51 Next scan bandwidths: 64.00 64.00 12 00 00 J0237+2848 21 52 33 33.5 85.2 -4.8 -43.0 0 0 12 00 00 12 05 00 =0234+285 21 57 34 34.2 86.2 -4.7 -43.1 300 19 12 00 01 12 07 00 J0237+2848 21 59 35 34.5 86.5 -4.7 -43.1 115 19 12 07 00 12 12 00 =0234+285 22 04 35 35.3 87.5 -4.6 -43.2 300 39 12 07 01 12 17 00 J0237+2848 22 09 36 36.0 88.5 -4.5 -43.2 294 39 12 17 00 12 27 00 =0234+285 22 19 38 37.5 90.5 -4.3 -43.2 600 77 12 17 01 12 32 00 J0237+2848 22 24 39 38.3 91.5 -4.2 -43.2 294 77 12 32 00 12 42 00 =0234+285 22 34 40 39.8 93.6 -4.1 -43.1 600 116 12 32 01 12 47 00 J0237+2848 22 39 41 40.5 94.6 -4.0 -43.1 294 116 12 47 00 12 57 00 =0234+285 22 49 43 42.0 96.8 -3.8 -42.9 600 155 12 47 01 13 02 00 J0237+2848 22 54 44 42.8 97.9 -3.7 -42.7 294 155 13 02 00 13 12 00 =0234+285 23 04 45 44.3 100.1 -3.6 -42.4 600 193 13 02 01 13 17 00 J0237+2848 23 09 46 45.0 101.2 -3.5 -42.2 294 193 13 17 00 13 27 00 =0234+285 23 19 48 46.5 103.6 -3.3 -41.8 600 232 13 17 01 13 32 00 J0237+2848 23 24 48 47.2 104.8 -3.2 -41.5 294 232 13 32 00 13 42 00 =0234+285 23 34 50 48.7 107.2 -3.1 -40.9 600 271 13 32 01 13 47 00 J0237+2848 23 39 51 49.4 108.5 -3.0 -40.5 294 271 13 47 00 13 57 00 =0234+285 23 49 53 50.8 111.1 -2.8 -39.7 600 309 13 47 01 14 02 00 J0237+2848 23 54 53 51.5 112.5 -2.7 -39.3 293 309 14 02 00 14 12 00 =0234+285 00 04 55 52.9 115.2 -2.6 -38.3 600 348 14 02 01 14 17 00 J0237+2848 00 09 56 53.5 116.7 -2.5 -37.7 293 348 14 17 00 14 27 00 =0234+285 00 19 58 54.9 119.7 -2.3 -36.5 600 386 14 17 01 14 32 00 J0237+2848 00 24 58 55.5 121.2 -2.2 -35.9 293 386 14 32 00 14 42 00 =0234+285 00 35 00 56.8 124.4 -2.1 -34.4 600 425 14 32 01 14 47 00 J0237+2848 00 40 01 57.4 126.1 -2.0 -33.6 293 425 14 47 00 15 00 00 =0234+285 00 53 03 58.9 130.7 -1.8 -31.3 780 475 14 47 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess125.L1024 --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 12 Station: DARNHALL Total bit rate: 512 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 2 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 2272.00 2272.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 9 BBC SB= L L IF = A1 B1 The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. Used with PCAL = off LO sum= 1626.49 1626.49 BBC fr= 645.51 645.51 Bandwd= 64.00 64.00 Matching frequency sets: 11 12 13 14 15 Track assignments are: track1= 1, 2 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) 0234+285 02 34 55.589593 * 02 37 52.405680 02 39 20.850129 0.11 * J0237+2848 28 35 11.40778 * 28 48 08.99003 28 54 45.77913 0.10 From catalog imbedded in main SCHED input file. SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline J0237+2848 sess125.L1024 1 2 3 4 5 6 7 8 9 10 11 2.050 215.250 EFFECT OF SOLAR CORONA The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) J0237+2848 74.7 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg